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Before contest
Codeforces Round #956 (Div. 2) and ByteRace 2024
16:48:59
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→ Filter Problems
Difficulty:
—
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
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Status
Standings
Custom test
Problems
#
Name
1974A
Phone Desktop
greedy
,
math
800
x30626
1973F
Maximum GCD Sum Queries
bitmasks
,
brute force
,
dp
,
implementation
,
number theory
3100
x176
1973E
Cat, Fox and Swaps
graphs
,
math
,
sortings
2500
x688
1973D
Cat, Fox and Maximum Array Split
brute force
,
interactive
,
math
2400
x1693
1973C
Cat, Fox and Double Maximum
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1700
x7332
1973B
Cat, Fox and the Lonely Array
binary search
,
bitmasks
,
data structures
,
greedy
,
math
,
two pointers
1300
x12521
1973A
Chess For Three
brute force
,
dp
,
implementation
,
math
900
x21986
1972B
Coin Games
games
900
x19300
1972A
Contest Proposal
brute force
,
greedy
,
two pointers
800
x21171
1971H
±1
2-sat
,
dfs and similar
,
graphs
2100
x1459
1971G
XOUR
data structures
,
dsu
,
sortings
1700
x8038
1971F
Circle Perimeter
binary search
,
brute force
,
dfs and similar
,
geometry
,
implementation
,
math
1600
x8640
1971E
Find the Car
binary search
,
math
,
sortings
1500
x12305
1971D
Binary Cut
dp
,
greedy
,
implementation
,
sortings
,
strings
1100
x23150
1971C
Clock and Strings
implementation
900
x29008
1971B
Different String
implementation
,
strings
800
x32803
1971A
My First Sorting Problem
implementation
,
sortings
800
x39634
1970G3
Min-Fund Prison (Hard)
bitmasks
,
dfs and similar
,
dp
,
graphs
,
trees
2400
x257
1970G2
Min-Fund Prison (Medium)
brute force
,
dfs and similar
,
dp
,
graphs
,
trees
2200
x455
1970G1
Min-Fund Prison (Easy)
dfs and similar
,
trees
1900
x1052
1970F3
Playing Quidditch (Hard)
implementation
2300
x306
1970F2
Playing Quidditch (Medium)
implementation
2300
x298
1970F1
Playing Quidditch (Easy)
implementation
2300
x371
1970E3
Trails (Hard)
dp
,
matrices
2200
x541
1970E2
Trails (Medium)
dp
,
matrices
2000
x934
1970E1
Trails (Easy)
dp
1800
x1549
1970D3
Arithmancy (Hard)
interactive
3100
x86
1970D2
Arithmancy (Medium)
constructive algorithms
,
interactive
,
probabilities
,
strings
2600
x164
1970D1
Arithmancy (Easy)
brute force
,
constructive algorithms
,
interactive
,
strings
2100
x493
1970C3
Game on Tree (Hard)
dfs and similar
,
dp
,
games
,
trees
1900
x1127
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x1947
1970C1
Game on Tree (Easy)
games
1400
x2547
1970B3
Exact Neighbours (Hard)
constructive algorithms
2300
x381
1970B2
Exact Neighbours (Medium)
constructive algorithms
2100
x615
1970B1
Exact Neighbours (Easy)
constructive algorithms
1900
x877
1970A3
Balanced Unshuffle (Hard)
constructive algorithms
,
trees
2400
x384
1970A2
Balanced Unshuffle (Medium)
brute force
,
constructive algorithms
,
trees
2400
x383
1970A1
Balanced Shuffle (Easy)
implementation
,
sortings
1000
x3547
1969F
Card Pairing
dp
,
greedy
,
hashing
,
implementation
3000
x201
1969E
Unique Array
binary search
,
data structures
,
divide and conquer
,
dp
,
greedy
2400
x1163
1969D
Shop Game
data structures
,
greedy
,
math
,
sortings
1900
x3960
1969C
Minimizing the Sum
dp
,
implementation
1700
x7469
1969B
Shifts and Sorting
constructive algorithms
,
greedy
1000
x17008
1969A
Two Friends
constructive algorithms
,
implementation
,
math
800
x18470
1968G2
Division + LCP (hard version)
binary search
,
brute force
,
data structures
,
dp
,
hashing
,
math
,
string suffix structures
,
strings
2200
x1681
1968G1
Division + LCP (easy version)
binary search
,
data structures
,
dp
,
hashing
,
string suffix structures
,
strings
1900
x3712
1968F
Equal XOR Segments
binary search
,
data structures
1800
x4773
1968E
Cells Arrangement
constructive algorithms
1600
x9247
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x13451
1968C
Assembly via Remainders
constructive algorithms
,
number theory
1000
x22508
1968B
Prefiquence
greedy
,
two pointers
800
x25855
1968A
Maximize?
brute force
,
math
,
number theory
800
x30819
1967F
Next and Prev
brute force
,
data structures
,
implementation
3200
x50
1967E2
Again Counting Arrays (Hard Version)
combinatorics
,
dp
,
math
3500
x83
1967E1
Again Counting Arrays (Easy Version)
combinatorics
,
dp
,
fft
,
math
3100
x167
1967D
Long Way to be Non-decreasing
binary search
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
,
two pointers
2800
x537
1967C
Fenwick Tree
bitmasks
,
brute force
,
combinatorics
,
data structures
,
dp
,
math
,
trees
2300
x1479
1967B2
Reverse Card (Hard Version)
brute force
,
math
,
number theory
2200
x3515
1967B1
Reverse Card (Easy Version)
brute force
,
math
,
number theory
1400
x11804
1967A
Permutation Counting
binary search
,
greedy
,
implementation
,
math
,
sortings
1400
x11023
1966B
Rectangle Filling
constructive algorithms
,
implementation
1100
x13603
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x16514
1965F
Conference
data structures
,
flows
3300
x127
1965E
Connected Cubes
constructive algorithms
,
games
3100
x207
1965D
Missing Subarray Sum
constructive algorithms
2900
x320
1965C
Folding Strip
constructive algorithms
,
greedy
,
strings
2300
x1641
1965B
Missing Subsequence Sum
bitmasks
,
constructive algorithms
,
greedy
,
number theory
1800
x5884
1965A
Everything Nim
games
,
greedy
,
math
,
sortings
1400
x12036
1958J
Necromancer
*special problem
3200
x20
1958I
Equal Trees
*special problem
,
graphs
,
meet-in-the-middle
3100
x25
1958H
Composite Spells
*special problem
,
dp
2600
x68
1958G
Observation Towers
*special problem
2400
x96
1958F
Narrow Paths
*special problem
,
combinatorics
2000
x164
1958E
Yet Another Permutation Constructive
*special problem
,
constructive algorithms
1900
x220
1958D
Staircase
*special problem
1600
x419
1958C
Firewood
*special problem
1500
x578
1958B
Clock in the Pool
*special problem
,
math
1400
x735
1958A
1-3-5
*special problem
,
dp
1100
x1370
1957F2
Frequency Mismatch (Hard Version)
binary search
,
data structures
,
dfs and similar
,
hashing
,
probabilities
,
trees
2700
x351
1957F1
Frequency Mismatch (Easy Version)
binary search
,
data structures
,
divide and conquer
,
hashing
,
probabilities
,
trees
2600
x407
1957E
Carousel of Combinations
brute force
,
combinatorics
,
dp
,
math
,
number theory
2400
x1116
1957D
A BIT of an Inequality
bitmasks
,
brute force
,
dp
,
math
1900
x4055
1957C
How Does the Rook Move?
combinatorics
,
dp
,
math
1600
x8634
1957B
A BIT of a Construction
bitmasks
,
constructive algorithms
,
greedy
,
implementation
1100
x16633
1957A
Stickogon
constructive algorithms
,
greedy
800
x21808
1956F
Nene and the Passing Game
constructive algorithms
,
data structures
,
dsu
,
graphs
,
sortings
3000
x306
1956E2
Nene vs. Monsters (Hard Version)
brute force
,
greedy
,
implementation
,
math
2700
x749
1956E1
Nene vs. Monsters (Easy Version)
brute force
,
implementation
,
math
2500
x1337
1956D
Nene and the Mex Operator
bitmasks
,
brute force
,
constructive algorithms
,
divide and conquer
,
dp
,
greedy
,
implementation
,
math
2000
x3540
1956C
Nene's Magical Matrix
constructive algorithms
,
greedy
,
math
1600
x11815
1956B
Nene and the Card Game
games
,
greedy
800
x20192
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x20392
1955H
The Most Reckless Defense
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graph matchings
,
shortest paths
2300
x1135
1955G
GCD on a grid
brute force
,
dfs and similar
,
dp
,
implementation
,
math
,
number theory
1900
x3963
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x6442
1955E
Long Inversions
brute force
,
greedy
,
implementation
,
sortings
1700
x7837
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x14023
1955C
Inhabitant of the Deep Sea
greedy
,
implementation
,
math
1300
x19477
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x25747
1955A
Yogurt Sale
math
800
x39656
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